Ω is a Greek letter, representing the weight in the mathematical weighted average, corresponding to the weight vector and weight matrix in the high number, and also representing the mass fraction of solute in the solution. The last letters of the Greek letters "ω" and "ω" have the same pronunciation as the Chinese character "ω", meaning "final".

When the language of "Ω" gradually changed from "oral legend" to "written language", the accurate pronunciation corresponding to symbols became an important index for the creation and perfection of Greek letters.

Extended data:

In The Birth of Letters, Mr. Wen Zeng, an otaku, found that "Ω" has graphic signs in museums such as Athens, Crete and Ionia, which has the same meaning as the hieroglyphic O in China six thousand years ago, and translated as the son of the sun with infinite power!

Now it represents the weight in the mathematical weighted average, which corresponds to the weight vector and weight matrix in the high number. It also indicates the mass fraction of solute in the solution. Usually expressed as a percentage.